Did you have a hard time _____ to Beijing? [ ]
A. get
B. got
C. to get
D. getting
答案:D
采用密接式车钩的旅客列车,在运行途中因故障更换15号车钩后,运行速度不得超过()
A.120km/h
B.140km/h
C.160km/h
D.200km/h
甲状腺显像的叙述,错误的是()
A.血流显像病人取仰卧位
B.血流显像采用高能通用准直器
C.静态显像常规采用前位平面采集
D.静态显像静脉注射99mTcO74~185MBq
E.甲状旁腺显像检查前30min口服过氯酸盐